| Substrates |
| Amitriptyline* (Elavil) |
| Benzodiazepines |
| Alprazolam (Xanax) |
| Triazolam (Halcion) |
| Midazolam (Versed) |
| Calcium blockers |
| Carbamazepine (Tegretol) |
| Cisapride (Propulsid) |
| Dexamethasone (Decadron) |
| Erythromycin |
| Ethinyl estradiol (Estraderm, Estrace) |
| Glyburide (Glynase, Micronase) |
| Imipramine* (Tofranil) |
| Ketoconazole (Nizoral) |
| Lovastatin (Mevacor) |
| Nefazodone (Serzone) |
| Terfenadine (Seldane) |
| Astemizole (Hismanal) |
| Verapamil (Calan, Isoptin) |
| Sertraline (Zoloft) |
| Testosterone |
| Theophylline* |
| Venlafaxine (Effexor) |
| Protease inhibitors |
| Ritonavir (Norvir) |
| Saquinavir (Invirase) |
| Indinavir (Crixivan) |
| Nelfinavir (Viracept) |
| Inhibitors |
| Antidepressants |
| Nefazodone > fluvoxamine (Luvox) > fluoxetine (Prozac) > sertraline |
| Paroxetine (Paxil) |
| Venlafaxine |
| Azole antifungals |
| Ketoconazole (Nizoral) > itraconazole (Sporanox) > fluconazole (Diflucan) |
| Cimetidine (Tagamet)† |
| Clarithromycin (Biaxin) |
| Diltiazem |
| Erythromycin |
| Protease inhibitors |
| Inducers |
| Carbamazepine |
| Dexamethasone |
| Phenobarbital |
| Phenytoin (Dilantin) |
| Rifampin (Rifadin, Rimactane) |